crandall



lid-7752,2051 PATENTED FEB. 16, 1904.

N. W. GRANDALL.

LOOK AND LATCH.

. APPLIGATIOI! FILED MAY 11, 1903.

K0 MODEL.

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No. -752,2o5.

Patented. February 16, 1904.

UNITED STATES PATENT OFFICE.

NATHAN W. CRANDALL, OF MERIDEN, CONNECTICUT, ASSIGNOR TO RUSSELL & ER WIN MANUFACTURING COMPANY, OF NEW BRITAIN, CONNECTICUT, A CORPORATION OFCONNECTICUT.

Look AND LATCH.

SPECIFICATION forming part of Letters Patent No. 752,205, dated February16, 1904. Application filed May 11,1908. Suit-1N0. 156,559. (No model.)

To wZZ whom it may concern/r Be it known that I, NATHAN W. CRANDALL, a

citizen of the United States, residing at Meriden, in the county of NewHaven, State of Connecticut, have invented certain new and usefulImprovements in Locks and Latches, of which the following is a full,clear, and exact description.

My invention relates to improvements in locks and latches; and theobject is to improve and simplify the construction of the same.

In the drawings, Figure 1 is an elevation of a door-lock with thecover-plate removed. Fig. 2 is a similar view of a portion of the lockshown in Fig. 1, certain parts being removed and broken away. Fig. 3 isa section of a lock on the plane of line 3 3, Fig. 1, showing thecover-plate in place.

1 is a lock case or frame.

2 is a latch.

3 is a bolt. V

The latch is controlled by the slide 4, oper ated by a roll-back 5.

The bolt 3 may be operated in the usual manner by a key, (not shown,)which may be inserted through a keyhole 6 in the case 1. The bolt 3passes through an opening in the face-plate 7 of the lock-case and isguided partially thereby. The guide for the bolt within the lock-casecomprises what I term the screw-stump 8. This screw-stump may be locatedat any suitable point near the center of the lock case or frame land isarranged to receive a suitable screw provided to hold the cover 9 inplace.

11 is a tumbler pivotally mounted on the screw-stump 8. The tumbler hasa nose 12, which normally engages in a notch in the bolt 3, as best seenin Fig. 1. The tumbler normally stands into the path of the key by whichthe lock is operated. When the proper key is inserted, it will elevatethe tumbler to the desired height to free the bolt and will also clearthe edge of anotch orrecess in the lower side of the bolt, whereupon theoperator may by still further turning the key throw the bolt into thelocking position.

The particular advantage of the foregoing construction resides in thesimplicity of construction attained by guiding the bolt 3 onthescrew-stump 8 and of hinging the tumbler 11 on the same member. Aspring 13 for operating the tumbler may also be sup ported on thescrew-stump. A supplemental spring 14L may also be employed, the samebeing used to supplement the action of the latchslide 4 in returning theroll-back hub to its normal position, the same being illustrated inFig. 1. In Fig. 2 the tumbler 11 has been removed to showohow the boltis guided on the same stud upon which the tumbler is pivotally mounted.In this figure it will be seen that the bolt has a slot in it to permitof the sliding movement thereof.

The assembling of the parts is very simple. The various members areeasily inserted, whereupon the cover 9 may be put in place and securedby means of a single screw.

What I claim is 1. In a lock, 2. latch-slide, a latch-bolt in connectiontherewith but having a retractive movement independently thereof, aseparate locking bolt, a tumbler therefor, a spring connecting saidtumbler and said latch-slide, and a second spring connecting saidtumbler and said latch-bolt.

2. In a lock and latch mechanism, the combination of alocking-bolt, atumbler therefor, a latch-bolt, a latch-slide therefor, a spiral springhaving one end engaging said tumbler and the other end engaging saidbolt, and a second spring having one end engaging said tumbler and theother end engaging said slide.

Signed at New Britain, Connecticut, this 28th day of April, 1903.

NATHAN W. CBANDALL. Witnesses:

M. S. WIARD, O. E. RUssELL.

